One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

This geothermal hot spring hides beneath a slowly growing mineral dome.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

The most magnificent bottle house in a town strangely full of them.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A stealthy Apache hideaway that became the haunting site of a mass grave.

A self-built castle made by a mysterious man.

A reproduction of earth's many biomes.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

A lively annual event in which thousands of people race to push coffins heavy with bodies up a hill.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The highest bridge in America was built for an almost unnervingly small amount of money.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

"I did this all while you were watching TV."

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.